fix: Troubleshooting too many local IP allocation failure logs

[elecbug]

Currently log systems periodically generate too many local IPv6 route failure messages.
It repeats the same content and only grows the size of the log.
Unless there are changes, the local IP binding failure message has been modified to occur only once.

[MarcoPolo]

What's the error you see?

[elecbug]

What's the error you see?

{"level":"debug","ts":"2024-09-06T02:24:26.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:24:31.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:24:36.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:24:41.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:24:46.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:24:51.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:24:56.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:01.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:06.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:11.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:16.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:21.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:26.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:31.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:36.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:41.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:46.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:51.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:25:56.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:01.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:06.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:11.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:16.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:21.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:26.310Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:31.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:36.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:41.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}
{"level":"debug","ts":"2024-09-06T02:26:46.311Z","logger":"basichost","caller":"basic/basic_host.go:380","msg":"failed to fetch local IPv6 address","error":"no route found for ::"}

This is the log I collected in the past, and if it cannot be bound to IPv6, an unnecessary amount of the same log is repeated infinitely. I thought this was a kind of problem, so I presented this PR.